An Interconnection-Damping-Assignment Passivity-Based Controller for a DC-DC Boost Converter with a Constant Power Load

This paper proposes an adaptive interconnection and damping assignment (IDA) passivity-based controller (PBC) with a complementary proportional integral (PI) controller for DC-DC boost converters with constant power loads (CPLs). Instead of deriving parameters of the IDA-PBC from computer simulations, a virtual circuit is introduced for determining the parameters of the IDA-PBC to make the system work in the under damping, critical damping, and over damping mode, respectively. Moreover, a complementary PI controller is designed for reducing the steady-state output voltage error of the IDA-PBC caused by the load variation. Simulation studies are carried out in MATLAB Simulink to validate the proposed control algorithm for a DC-DC boost converter with a CPL; results show that the proposed controller not only ensures the stability and fast response of the system in different modes but also is robust to load variations. Experimental results are provided to further validate the design and simulation of the proposed controller.